22
* Note: correction factor = (enthalpy of air temperature - enthalpy of water temperature) in BTU /LB divided by 13.97.
Capacity Correction Factors* To Coil Performance
Of 67°F. Wb Air And 45 Entering Water
Ent Air WB
Entering Water Temperature °F.
TEMP. °F.
40
41
42
43
44
45
46
47
48
49
50
60
0.805
0.782
0.736
0.702
0.666
0.630
0.594
0.556
0.518
0.480
0.440
61
0.853
0.819
0.785
0.750
0.715
0.680
0.643
0.606
0.568
0.529
0.490
62
0.903
0.869
0.836
0.801
0.765
0.730
0.693
0.656
0.618
0.579
0.540
63
0.954
0.921
0.887
0.852
0.817
0.781
0.745
0.707
0.670
0.631
0.591
64
1.007
0.974
0.940
0.905
0.870
0.834
0.798
0.760
0.722
0.684
0.644
65
1.062
1.028
0.994
0.959
0.924
0.888
0.852
0.815
0.777
0.738
0.699
66
1.117
1.083
1.049
1.014
0.979
0.943
0.907
0.870
0.832
0.793
0.754
67
1.173
1.140
1.106
1.071
1.036
1.000
0.963
0.926
0.888
0.850
0.810
68
1.230
1.197
1.163
1.128
1.093
1.057
1.021
0.984
0.946
0.907
0.868
69
1.290
1.256
1.223
1.188
1.152
1.117
1.080
1.043
1.005
0.966
0.927
70
1.350
1.316
1.283
1.248
1.213
1.177
1.140
1.103
1.065
1.026
0.987
71
1.412
1.378
1.344
1.309
1.274
1.238
1.202
1.165
1.127
1.088
1.049
72
1.475
1.441
1.407
1.372
1.337
1.301
1.265
1.228
1.190
1.151
1.112
73
1.540
1.506
1.472
1.437
1.402
1.366
1.330
1.293
1.255
1.216
1.177
74
1.606
1.572
1.538
1.503
1.468
1.432
1.396
1.359
1.321
1.282
1.243
Coil Perfromance- Chilled Water MBH/SQ FT
1/2" and 5/8" tube, entering air 80°F. DB, 67°F. WB
Type A and Type 5, chilled water at 45°F., cooling capacities
MBH per SQ FT of coil face area (Max. water veocity= 3 fps)
Note: Please contact your representative for ARI ratings for coils. These tables are only estimates.
For estimates for other wet bulb and water temperatures, multiply by correction factor in
Table 20.
Actual capacity will vary
with coil circuiting
and flow rate
Table 19
Chilled
Water
FPM, Type A Coils (1/2" DIA.) FPM, Type 5 Coils (5/8" DIA.)
Rows
FPI
400
450
500
550
600
400
450
500
550
600
6
7.3
7.9
8.3
8.8
9.2
10.3
11.2
12.0
12.4
12.9
8
8.7
9.3
9.9
10.5
11.0
11.5
12.5
13.5
14.0
14.5
3
10
9.8
10.6
11.3
12.0
12.6
12.5
13.7
14.7
15.2
15.8
12
10.9
11.7
12.5
13.2
14.0
13.3
14.5
15.6
16.2
16.8
14
11.7
12.7
13.6
14.4
15.2
13.9
15.2
16.4
17.0
17.6
6
9.1
9.8
10.4
11.0
11.6
12.3
13.4
13.7
14.8
15.7
8
10.6
11.4
12.2
12.9
13.6
13.6
14.9
15.3
16.4
17.5
4
10
11.8
12.8
13.7
14.6
15.4
15.4
16.1
17.5
18.7
19.4
12
12.9
14.0
15.0
16.0
16.9
16.2
16.9
18.5
19.9
20.6
14
13.8
15.0
16.1
17.2
18.2
16.9
17.7
19.3
20.7
21.5
.
6
11.7
12.6
13.5
14.3
15.1
14.6
15.6
16.4
17.1
17.8
8
13.4
14.6
15.6
16.6
17.2
16.1
17.2
18.1
18.9
19.7
5
10
14.8
16.1
17.0
17.7
18.5
17.2
18.4
19.4
20.2
21.1
12
15.9
17.0
17.9
18.7
19.6
17.5
19.3
20.4
21.4
22.2
14
16.8
17.8
18.7
19.5
20.4
18.2
20.0
21.1
22.2
23.1
6
13.1
14.1
15.2
16.1
17.1
15.9
17.3
17.8
19.1
20.3
8
14.8
16.1
17.3
18.5
19.6
17.3
19.0
19.4
20.9
22.3
6
10
16.2
17.6
19.0
20.1
20.9
18.3
20.2
20.6
22.2
23.8
12
17.2
18.9
20.2
21.2
22.0
19.1
21.1
21.5
23.2
24.9
14
18.1
19.9
21.0
22.0
22.9
19.8
21.9
22.5
24.4
26.2
6
16.0
17.4
19.0
20.0
20.8
18.3
20.1
20.6
21.7
22.6
8
17.7
19.4
20.6
21.7
22.6
19.6
21.6
22.3
23.4
24.5
8
10
19.0
20.5
21.8
23.0
23.9
20.5
22.7
23.4
24.7
25.9
12
19.9
21.4
22.7
23.9
25.0
21.4
23.7
24.3
25.7
26.9
14
20.4
22.0
23.4
24.7
25.8
21.8
24.2
24.9
26.3
27.7
Table 20
